Baseband signal processing method and device

A baseband signal processing and baseband signal technology, applied in the field of communications, can solve the problems of serious out-of-band radiation of signals, low out-of-band suppression, and inability to suppress spectral aliasing well, and achieve the effect of suppressing out-of-band radiation.

Active Publication Date: 2019-09-27
BEIJING RUNKE GENERAL TECH
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Problems solved by technology

[0005] In view of this, the present invention provides a baseband signal processing method and device to solve the problem of resampling with fixed integer multiples in the process of interpolation or extraction in the prior art, and filtering of resampled sig

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  • Baseband signal processing method and device
  • Baseband signal processing method and device

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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] In order to achieve variable-rate sampling for baseband signals and effectively suppress out-of-band radiation during upsampling and spectrum aliasing during downsampling in terms of filtering, the inventors of this case conducted in-depth research and finally proposed a baseband signal processing method Next, the baseband signal processing method provided by the present invention will be introduced through the following embodiments.

[0057] see figur...

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Abstract

The invention provides a baseband signal processing method and device. The method includes: enabling a sending end to firstly generate a variable-rate sampling enable clock; performing interpolation on the first baseband signal according to the variable rate sampling rate enabling clock; and finally, carrying out multi-stage cascade moving average filtering on the first data sequence obtained by interpolation by using a multi-stage cascade average filter; taking a data sequence obtained after filtering as a final upsampling signal to be sent to receiving end equipment; and enabling the receiving end to perform multi-stage cascade moving average filtering on the second baseband signal by using a multi-stage cascade average filter, generating a variable-rate sampling enable clock which is the same as that of the transmitting end, extracting data from a second data sequence obtained after filtering according to the variable-rate sampling enable clock, and taking the extracted data sequence as a final down-sampling signal. According to the invention, variable-rate sampling can be realized according to the variable-rate sampling enable clock, and out-of-band radiation of a signal during up-sampling and frequency spectrum aliasing of the signal during down-sampling can be effectively inhibited through multi-stage cascade moving average filtering.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a baseband signal processing method and device. Background technique [0002] In a general communication system, the symbol rate is one or several rates that are fixed, which makes the relationship between the sampling rates of all levels in the signal processing process a fixed proportional relationship, and the proportional relationship between the sampling rates can be It is realized by the method of sampling rate conversion. [0003] At present, signal resampling is implemented by integer multiple interpolation or extraction of the signal sequence. When the same integer multiple is used for interpolation and extraction, the obtained signal sequence has an integer multiple relationship. When different integer multiples are used for interpolation and extraction , the obtained signal sequence is an integer multiple or a non-integer multiple, and finally the int...

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Application Information

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IPC IPC(8): H04L25/03
CPCH04L25/03159H04L25/03006
Inventor 杨晓宇张序琦
Owner BEIJING RUNKE GENERAL TECH
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